Color-lake and producing same.



sameame refiner-canton.

CARL TMMERHEISER, F LUDWIGSHAFEN- ON-THE-RHINE, AND ANTON BEYER, OF-

MANNHEIM, GERMANY, ASSIGNORS T0 BADISCHE ANILIN & SODA FABRIK, OF

LUDWIGSHAFEN-ON-THE-BHTN'E, GERMANY,

.l CORPORATION.

COLOR-LAKE AND raonucme SAME.

No Drawing.

'To all whom it may concern:

Be it known that we, CARL TMMERHEISER and ANTON BEYER, citizens of the German .Empire, residing at Ludwigshafen on-the- Rhine and Mannheim respectively, Gen many, have invented new and useful Improvements in Color-Lakes and Producing Same, of which the following is a specification. J

We have discovered that coloring matter lakes which possess a great brilliancy, are extremely fast to water and very fast against the action of light, can be obtained by precipitating basic coal tar coloring matters by means of a complex acid" containing tun sten, for instance, phosphotungstic aci and silicotungstic acid, and as instances of phosphotungstic acids which can be used according to our invention, we mention phospho duodecitungstic acid and the phospho-luteo tungstic acid described in the Zeitschrift fiir Anorganiscke Uhemie,

vol. .1, page L31. For the purposes of this invention, we regard salts of the said com plex acids as equivalent to the acidstherhselves.

The following example will serve to illustrate further the nature of this invention, which, however, is not confined to this example. The parts are by weight.

Eaiample.

Mix one hundred parts ofa ten paste containing aluminium hydrate and (obtainable by mixing together aqueous solutions of ten parts of aluminium sulfate containing 18% A1 0 five parts of calcined sodium carbonate and per cent.

Specification of Letters Patent. Patented July it), 191?. Application filed August 3, 1914. Serial No. 854,732. 7

perature, and either with or without the addition of Turkey red oil, sodium acetate, or other suitableaddition or additions. The precipitation can, for instance, be carried out in thepresence of any suitable substratum, and the concentration of the various ingredients can be varied within wide limits.

Instead of crystal tar coloring matters can be used, such as other violets of cognate nature, the dyestuffs of the rhodamin, auramin, malachite green series, or the dyestufi" which can be obtained by condensing. benzaldehyde-o-sulfonic acid with diethyl-anilin and sulfonating the condensation product and dyestufi's of similar kind, and so on. and in lieu of the sodium phospho-duodeci-tungstate other complex acids of tungsten or salts thereof are equally suitable for the purpose of the invention. All of the compositions belonging to the classes defined above are operative so far as the inventors are aware.

Now what we claim is 1. A coloring matter lake containing the combination of the color base of a basic coal tar coloring matter 'with a complex acid containing tungsten.

2. A coloring matter lake containing the combination of the color base of a basic coal tardcoloring matter with a phosphotungstic ac1 3. A coloring matter lake containing the combination of the 00101. base of a basic coal tar coloring matter with phosphoduodeci-tungstic acid.

twelve parts of barium chlorid) with a so lution of one part of crystal violet (a salt of hexamethyl-triamino-triphenylcarbinol) in one hundred parts of water and then add an aqueous solution of from two to three parts of acid sodium phospho-duodeci-tungstate until the coloring matter is completely precipitated. The pure violet lake is then filtered ofi' and can be worked up in the usual manner.-

The precipitation can ordinary temperature, or at take place at the a raised mm- 4. A coloring matter lake containing the combination of hexamethyltriamino-triphenylcarbinol with phosphoduodecitungstic acid.

5. The process of producing coloring matter lakes by precipitating a basic coal tar coloring matter by means of a complex acid containingtungsten.

6. The process of producing coloring matter lakes by precipitating a basic coal tar coloring matter by means of a phosphotungstic acid.

'7. The process of producing coloring matter lakes by precipitating a basic coal tar violet other basic coal' coloring matter by means of phosphoset ourhands in the presence of two subdubdecl-tungstic acid. scribing Witnesses.

'8. The process of producing a coloring '(JARL IMMERHEISERW matter lake by precipieating of'hexamethyl- Y ANTON BEYER. .5 triamino-triphenylcarbinol with acid sd- Witnesses: I

dium-phospho-duodeci-tungstate. J.-ALE0 LLOYD, In testimony whereof 'we have hereunto ,AUSTEN HERB. 

